Flex.h

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/*
Copyright (C) 2000  Dancer A.L Vesperman

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef __FLEX_H_
#define __FLEX_H_

#ifndef PENTAGRAM // DONT'T INCLUDE THIS IN PENTAGRAM!

#include <vector>
#include <string>
#include <iosfwd>
#include "common_types.h"
#include "U7file.h"

class DataSource;


class Flex : public U7file
{
protected:
  char  title[80];
  uint32  magic1;
  uint32  count;
  uint32  magic2;
  uint32  padding[9];
  struct Reference
  {
    uint32 offset;
    uint32 size;
    Reference() : offset(0),size(0) {};
  };
  std::vector<Reference> object_list;

public:
  Flex(const std::string &fname);
  Flex(const Flex &f) : magic1(f.magic1),count(f.count),magic2(f.magic2),object_list(f.object_list)
    { std::memcpy(title,f.title,sizeof(title));
      std::memcpy(padding,f.padding,sizeof(padding)); }
  Flex &operator=(const Flex &f)
    {
      magic1=f.magic1;
      count=f.count;
      magic2=f.magic2;
      object_list=f.object_list;
      std::memcpy(title,f.title,sizeof(title));
      std::memcpy(padding,f.padding,sizeof(padding));
      return *this;
    }
    
   virtual uint32 number_of_objects(void) { return object_list.size(); };
   virtual  char *  retrieve(uint32 objnum,std::size_t &len); // To a memory block
  virtual const char *get_archive_type() { return "FLEX"; };
          // Write header for a Flex file.
  static void write_header(DataSource* out, const char *title, int count);

  static bool is_flex(DataSource *in);
  static bool is_flex(const char *fname);
private:
  Flex(); // No default constructor
  void IndexFlexFile(void);
};

/*
 *  This is for writing out a whole Flex file.
 */
class Flex_writer
  {
  std::ofstream *out;   // What we're writing to.
  int count;      // # entries.
  int index;      // Current index.
  long cur_start;     // Start of cur. entry being written.
  uint8 *table;     // Table of offsets & lengths.
  uint8 *tptr;      // ->into table.
public:
  Flex_writer(std::ofstream &o, const char *title, int cnt);
  ~Flex_writer();
  void mark_section_done(); // Finished writing out a section.
  bool close();     // All done.
  };

#endif // PENTAGRAM

#endif

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